/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.apis.preference;

import com.example.android.apis.R;

import android.os.Bundle;
import android.preference.PreferenceActivity;
import android.preference.PreferenceFragment;
import android.preference.PreferenceManager;
import android.util.Log;
import android.widget.Button;

import java.util.List;

/**
 * Demonstration of PreferenceActivity to make a top-level preference panel with
 * headers.
 */

public class PreferenceWithHeaders extends PreferenceActivity {
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		// Add a button to the header list.
		if (hasHeaders()) {
			Button button = new Button(this);
			button.setText("Some action");
			setListFooter(button);
		}
	}

	/**
	 * Populate the activity with the top-level headers.
	 */
	@Override
	public void onBuildHeaders(List<Header> target) {
		loadHeadersFromResource(R.xml.preference_headers, target);
	}

	/**
	 * This fragment shows the preferences for the first header.
	 */
	public static class Prefs1Fragment extends PreferenceFragment {
		@Override
		public void onCreate(Bundle savedInstanceState) {
			super.onCreate(savedInstanceState);

			// Make sure default values are applied. In a real app, you would
			// want this in a shared function that is used to retrieve the
			// SharedPreferences wherever they are needed.
			PreferenceManager.setDefaultValues(getActivity(),
					R.xml.advanced_preferences, false);

			// Load the preferences from an XML resource
			addPreferencesFromResource(R.xml.fragmented_preferences);
		}
	}

	/**
	 * This fragment contains a second-level set of preference that you can get
	 * to by tapping an item in the first preferences fragment.
	 */
	public static class Prefs1FragmentInner extends PreferenceFragment {
		@Override
		public void onCreate(Bundle savedInstanceState) {
			super.onCreate(savedInstanceState);

			// Can retrieve arguments from preference XML.
			Log.i("args", "Arguments: " + getArguments());

			// Load the preferences from an XML resource
			addPreferencesFromResource(R.xml.fragmented_preferences_inner);
		}
	}

	/**
	 * This fragment shows the preferences for the second header.
	 */
	public static class Prefs2Fragment extends PreferenceFragment {
		@Override
		public void onCreate(Bundle savedInstanceState) {
			super.onCreate(savedInstanceState);

			// Can retrieve arguments from headers XML.
			Log.i("args", "Arguments: " + getArguments());

			// Load the preferences from an XML resource
			addPreferencesFromResource(R.xml.preference_dependencies);
		}
	}
}
